<div dir="auto">Backing up from inside each VM doesn't solve the problem<div dir="auto">If you have to backup 500VMs you just need more than 1 day and what if you have to restore the whole gluster storage?</div><div dir="auto"><br></div><div dir="auto">How many days do you need to restore 1PB?</div><div dir="auto"><br></div><div dir="auto">Probably the only solution should be a georep in the same datacenter/rack with a similiar cluster, </div><div dir="auto">ready to became the master storage.</div><div dir="auto">In this case you don't need to restore anything as data are already there, </div><div dir="auto">only a little bit back in time but this double the TCO</div></div><div class="gmail_extra"><br><div class="gmail_quote">Il 23 mar 2017 6:39 PM, "Serkan Çoban" <<a href="mailto:cobanserkan@gmail.com">cobanserkan@gmail.com</a>> ha scritto:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Assuming a backup window of 12 hours, you need to send data at 25GB/s<br>
to backup solution.<br>
Using 10G Ethernet on hosts you need at least 25 host to handle 25GB/s.<br>
You can create an EC gluster cluster that can handle this rates, or<br>
you just backup valuable data from inside VMs using open source backup<br>
tools like borg,attic,restic , etc...<br>
<br>
On Thu, Mar 23, 2017 at 7:48 PM, Gandalf Corvotempesta<br>
<<a href="mailto:gandalf.corvotempesta@gmail.com">gandalf.corvotempesta@gmail.<wbr>com</a>> wrote:<br>
> Let's assume a 1PB storage full of VMs images with each brick over ZFS,<br>
> replica 3, sharding enabled<br>
><br>
> How do you backup/restore that amount of data?<br>
><br>
> Backing up daily is impossible, you'll never finish the backup that the<br>
> following one is starting (in other words, you need more than 24 hours)<br>
><br>
> Restoring is even worse. You need more than 24 hours with the whole cluster<br>
> down<br>
><br>
> You can't rely on ZFS snapshot due to sharding (the snapshot took from one<br>
> node is useless without all other node related at the same shard) and you<br>
> still have the same restore speed<br>
><br>
> How do you backup this?<br>
><br>
> Even georep isn't enough, if you have to restore the whole storage in case<br>
> of disaster<br>
><br>
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</blockquote></div></div>